#include<stdio.h>
#include"20191330head.h"
int main(void){
	int a,b;
	int i=0;
	while (i <= 1330)
	{
	i++;
	}
	printf("enter two numbers:");
	scanf("%d %d",&a,&b);
	printf("20191330add:%d\n",add(a,b));
	printf("20191330sub:%d\n",sub(a,b));
	printf("20191330mul:%d\n",mul(a,b));
	printf("20191330div:%lf\n",div(a,b));
	return 0;
}
//20191330

